Tests on plain and reinforced concrete beams . The Ransorae bar is simply a square bar twisted about 8 revolutions in a foqt , not. sho-rn in sketch. The steel used in it is also low, though tlie elastic limit has been raised by iber 0re tw i s t ing the twisting,^ being about the same grade as the Tiiacher and Kahn. The yield point of the plain rods used was about 35,000 lb., per sq. in. Throe sizes of plain rods 1/2 and 3/4 inchsquare and 1/2 inch round were used, the actual sections cor-responding closely to the nominal 10. DESCRIPTION OF The test included thirty one beams.
Tests on plain and reinforced concrete beams . The Ransorae bar is simply a square bar twisted about 8 revolutions in a foqt , not. sho-rn in sketch. The steel used in it is also low, though tlie elastic limit has been raised by iber 0re tw i s t ing the twisting,^ being about the same grade as the Tiiacher and Kahn. The yield point of the plain rods used was about 35,000 lb., per sq. in. Throe sizes of plain rods 1/2 and 3/4 inchsquare and 1/2 inch round were used, the actual sections cor-responding closely to the nominal 10. DESCRIPTION OF The test included thirty one beams. Of these there v/ereeight reinforced with Johnson bars, three with Thacher, fivewith Kahn, one with Ransonie, three with plain square, two withplain round bars and the remaining nine were plain concrete with-out any reinforcinr. Twenty-four of tire beams v/ere 15 feet 4inches long and were tested at 14 foot span, the other sevenranged in length from 12 to 6 feet and were tested at various .spans as shown inplates, A 14 foot span was chosen since thatlength is in coim.;on use in practice and also since it was aslong as convenient under the circumstances. All of the beamswere made of a uniform width and depth, 12 inches by 13 l/?inches respectively, for the purpose of eliminating variables,which would evidently arise in testing beams with cross-sectionof different shapes. The section chosen has been criticised inthat it is not the most economical one which could be made outof the giVen amount of material. The idea in mind,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1904
